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Q1. | If the Froude's number of flow in an open channel is more than 1.0 then the flow is said to be |

A. | Critical [Wrong Answer] |

B. | Shooting [Correct Answer] |

C. | Streaming [Wrong Answer] |

D. | Transitional [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ The specific gravity of water at standard temperature (4°C) equals to

0.999

1.000

1.010

0.500

⇒ A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be.

1 m

10m

100m

none of the above

⇒ In a tank or channel, notch is provided measure

Velocity

Pressure

Discharge

Static energy

⇒ The pressure drag depends upon

The boundary layer formation

The separation of boundary layer

The size of wake

Both (B) and (C) above

⇒ The tangential force exerted by the shearing stresses on an object submerged in a fluid is known as

Pressure drag

Surface drag

Drag

Lift

⇒ The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is.

32 km

20 km

8 km

4 km

⇒ As ideal fluid is

One which obeys Newton's law of viscosity

One which satisfies continuity equation

One which flows through pipes with least friction

Frictionless and incompressible

⇒ A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is

Equal to that of water

Half the density of water

Double the density of water

The question is incomplete

⇒ For laminar flow in circular pipes, the Darcy's friction factor f is equal to.

16/Re

32/ Re

64/ Re

none of the above where R,, is Reynolds number.

⇒ The discharge through a V- notch varies as

H1/2

H3'2

H5/2

H5'4 where H is head.

⇒ When a loaded boat enters into the sea from a river. it rises because

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Sea water is denser than river

There is difference of temperature

Sea is deeper than river

⇒ In steady flow of a fluid, the total accele ration of any fluid particle

can be zero

is never zero

is always zero

is independent of coordinates

⇒ Which of the following is used to measure the discharge ?

current meter

venturimeter

pitot tube

hotwire anemometer

⇒ The sheet of water flowing through a notch or over a weir is known as

Nappe

Crest

Height of weir/notch

Sill

⇒ Newton's law of viscosity relates.

intensity of pressure and rate of angular deformation

shear stress and rate of angular deformation

shear stress, viscosity and temperature

viscosity and rate of angular deformation

⇒ Bernoulli's equation is applied to

Venturimeter

Orifice meter

Pitot tube

All of these

⇒ The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is.

1/2

2/3

3/2

2

⇒ The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is.

d > m > e

d > e > m

e > m > d

e > d > m

⇒ Equation of continuity is based on the principle of conservation of

mass

energy

momentum

none of the above

⇒ Select the incorrect statement.

The pressure intensity at vena contracta is atmospheric.

Contraction is least at vena contracta.

Stream lines are parallel throughout the jet at vena contracta.

Coefficient of contraction is always less than one.

⇒ The thickness of boundary layer at the leading, (entrance) edge will be

Maximum

Minimum

Zero

Average

⇒ In which of the following the friction drag is generally larger than pressure drag?

a circular disc or plate held normal to flow

a sphere

a cylinder

an airfoil

⇒ At vena contracta jet has the minimum area of cross section and so the velocity of liquid at this section will be

Minimum

Maximum

Average

Zero

⇒ Pressure at a point inside a liquid does not depend on

The depth of the point below the surface of the liquid

The nature of the liquid

The acceleration due to gravity at that point

The shape of the containing vessel

⇒ The pitot tube is used to measure

velocity at stagnation point

stagnation pressure

static pressure

dynamic pressure

⇒ As compared to laminar flow, in turbulent flow, boundary layers will be

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Thicker

Same

Half

⇒ 1 atm. pressure is equivalent to

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^{2}

1000 newton

760 mm Hg

14.7 pascal

⇒ If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be.

from reservoir A to reservoirs B and C

from reservoir B to reservoirs C and A

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unpredictable

⇒ Flow in a pipe is laminar if the Reynold's number is

Less than 2000

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Between 4000 and 6000

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⇒ For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

300

337.5

600

675